import javax.sound.sampled.*;

public class StereoOut {

	protected SourceDataLine sourceDataLine = null;
	
	protected byte  [] audioData;
	protected short [] audioSamples;
	protected short [] audioSamples2;

	protected boolean stop = false;
	
	public static final int DURATION = 1000;
	public static final double FREQ = 1000.0;   // Hz
	public static final double FREQ2 = 595.0;   // Hz
	public static final double AMP = 32767.0;
	
	public StereoOut() {
		AudioFormat audioFormat = new AudioFormat(44100.0F, 16, 2,
							  true, false);
		try {
			DataLine.Info dataLineInfo =
				new DataLine.Info(SourceDataLine.class,
						  audioFormat);
			sourceDataLine = (SourceDataLine)
				AudioSystem.getLine(dataLineInfo);
			sourceDataLine.open(audioFormat);
		} catch (Exception e) {
			e.printStackTrace();
		}
	
		audioSamples = new short[(44100 * DURATION)/1000];
		double inc = (2.0 * java.lang.Math.PI * FREQ)/44100;
		double j = 0.0;
		for (int i=0; i < audioSamples.length; i++) {
			audioSamples[i] = (short)(AMP*java.lang.Math.sin(j));
			//System.out.println(audioSamples[i]);
			j += inc;
		}
		
		audioSamples2 = new short[(44100 * DURATION)/1000];
		double inc2 = (2.0 * java.lang.Math.PI * FREQ2)/44100;
		double j2 = 0.0;
		for (int i=0; i < audioSamples2.length; i++) {
			audioSamples2[i] = (short)(AMP*java.lang.Math.sin(j2));
			//System.out.println(audioSamples2[i]);
			j2 += inc2;
		}

		audioData = new byte[audioSamples.length * 4];
		for (int i = 0; i < audioData.length; i += 4) {
			audioData[i] =
				(byte) (audioSamples[i/4] & 0x00FF);
			audioData[i+1] =
				(byte) ((audioSamples[i/4] >> 8) /*& 0x00FF*/);
			audioData[i+2] =
                         	(byte) (audioSamples2[i/4] & 0x00FF);
			audioData[i+3] = 
				(byte) ((audioSamples2[i/4] >> 8) /*& 0x00FF*/);
			//System.out.println(audioData[i+1] + " + " + audioData[i] + " = " + (double) ((new java.lang.Byte(audioData[i+1]).intValue() * 256) | (0xFF & new java.lang.Byte(audioData[i]).intValue())));
		}
		
	}

	public void play() {
		sourceDataLine.start();
		//for (int i = 0; i < 5; i++) {
		while (!stop) {
			sourceDataLine.write(audioData, 0, audioData.length);
		}
		sourceDataLine.drain();
		sourceDataLine.stop();
		sourceDataLine.close();
	}

	public void stopIt() {
		stop = true;
	}

	public static void main (String [] args) {
		StereoOut test = new StereoOut();
		test.play();
	}
}